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    <title>Document</title>
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    <div id="demo">
       <div :class="{active:isActive,'text-danger':hasError}">给class绑定一个对象,动态切换</div>
       <div :class="{active:isActive,'textDanger':!isActive}">给class绑定一个对象,动态切换</div>
       <div :class="classObj">给class绑定一个对象,动态切换</div>
    
      
    </div>
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        var demo = new Vue({
            el:"#demo",
            data:{
                isActive:true,
                hasError:true,
                classObj:{
                    "textColor":true,
                    "textSize":false
                }
               
            }
        })
    </script>
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